Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 420 off
USE CODE: asknikunj


size of gallium is less than aluminium due to d-orbitals,but why so?

4 years ago


Answers : (2)


Hi Ranjita,


The atomic radius of the Ga is less than Al because of poor screening effect.

The atomic radius of Ga is slightly lesser than of Al because in going from Al to Ga, the electrons have already occupied 3d sub shell in Ga. The screening effect of these intervening electrons being poor, has less influence to decrease the effective nuclear charge, therefore the electrons in Ga experience more forces of attractions towards nucleus to result in lower size of Ga than Al.



Ashwin (IIT Madras).

4 years ago
The shielding effect of d-orbitals is very poor due to it’s diffused-spreading-shape in case of gallium. The d-orbital have diffused nature and thus poor shielding-effect.The shielding is just reducing impact of effective positive nuclear charge on the outer most electrons. The position of Gallium is just immediately after Zn which has completly filled d-orbitals ( 10 electrons). This makes the pronunced effect of nuclear charge (Zeff) and we find reduction in atomic radius of Gallium. It is thus diffused d-orbitals and their inability to shield the strong +ve charge which changes the trend of Atomic Radius. The Ga At. radius is thus unexpectedly smaller than Al and change in trend of Periodic Table set-up.  
one year ago

Post Your Answer

Other Related Questions on Inorganic Chemistry

What is the conflict (difference/contradiction) between VSEPR Theory and valence bond theory? And how hybridization resolved it?
@ manas Vsepr is actually the modified form of vbt . The basic principle of the valence shell electron pair repulsion ( VSEPR ) theory is that each group of valence electrons around a...
Umakant biswal one month ago
Can u give any trick for identified metals and non metals
@ amresh metal and non metals can be easily identified in a reaction . metals have a tendency to accept the electrons generally , but non metal lacks that . metals are sonorous , ductile...
Umakant biswal 5 days ago
out of 2p ans 2s which one has a higher peak in radial probability distribution curve and why?
In 2s orbital probability of find the elctron is maximum. as it has spherical structure where as in p obital are dumble shape therfore probaility is not sure maximum. HENCE u can now...
Vikas TU 27 days ago
How do antiseptics differ from disinfectants............?
Antiseptics are the chemical substance which prevent the growth of microorganisms and are capable of killing them without harming the human tissues. These are applied on wounds, ulcers,...
SAI SARDAR one month ago
@ hari Disinfectants are chemical agents used to disinfect inanimate objects and surfaces. Examples of disinfectants include iodine solution, copper sulfate, ozone, and chlorine gas....
Umakant biswal one month ago
How to use log table????????Its urgent please sort out it as soon as possible.. Just go through this link and you will get this.
Suraj Prasad one month ago
here are the way u can use log tables for multiplication of numbers 1- Understand how to multiply numbers using their logarithms. 2- Look up the logarithms of the two numbers you want to...
Umakant biswal one month ago
What are analgesics and food preservatives.........?
Analgesics are drugs that reduce or totally abolish pain without causing disturbances of nervous system. There are two types of analgesics i. Narcotic analgesics E.g.: Morphine ii....
SAI SARDAR one month ago
Analgesis is defined as the drugs that reduce or abolish pain without causing impairment of conciousness,mental confusion,incoordinationor paralysis or some other disturbances of nervous...
somprasad one month ago
An analgesic or painkiller is any member of the group of drugs used to achieve analgesia , relief from pain. Analgesic drugs act in various ways on the peripheral and central nervous...
Umakant biswal one month ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 4,500 off
USE CODE: asknikunj

Get extra R 420 off
USE CODE: asknikunj

More Questions On Inorganic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details